In order to regulate the combustion gas generation of propellant burning process, the triple base propellant with surface layer micro-porous structure was prepared in water by dissolution method.And its performance were studied and compared with original triple base propellant.The static combustion performance was investigated by closed-bomb test, and the mechanical properties were measured by an universal testing machine and impact testing machine, and the interior ballistic performance was studied by 155 mm gun.Results show that the burning pressure of the sponge-like micro-porous structure propellant rises faster compared with that of original propellant, and the burning times shortens by 3.2 ms at normal temperature.The initial dynamic vivacity is high, and the progressive combustion performance of the sponge-like micro-porous structure propellant is lower than those of the original.The burning rate increases in the ignition stage, but is the same as the original propellant in the later period.The compressive strength and anti-impact strength of surface micro-porous structure propellant decrease, most at 20 ℃ by 2.98 MPa and 0.35 kJ·m^-2, respectively.The muzzle velocity of reduced charge increases by 13.9 m·s^-1 and the muzzle velocity of full charge increases by 15.0 m·s^-1, and the chamber pressure reduces also.